Paper fastener



J. w. MCADAM PAPER FAsTENE vOriginal Filed Feb.v

F m a m n m x l n W\ m M im. r W w K us. 31,1926.

lNvENTR' ATTORNEY il 2%/ Am wn'NEssES Patented Aug. 3l, 1926.

UNITED STTES essaies errar F PAPER FASTENER.

Original application led February 9, 1924, Serial No. 691,754.v Divided and this application led'February sei-iai no.' 12,290.

This invention relates to paper fasteners,

and especially to that class of fasteners used for holding drawing paper or tracing paper or linen down in proper position on drawing boards, the present application being a divisional application of the one filed by me on February 9, 1924i, Serial No. 691,754, for a drawing board. f

The object is to provide a simple, cheaply manufactured and strong and durable device which may be easily formed by stamping the parts from sheet vmetal, or the proper non-corrosive, non-rusting kind, -and which may be readily installed in Aposition in the surface of said board, as a permanent attachment thereof, to be easily and quickly opened for the reception of the proper edge of the paper, or other material, and as easily closed to penetrate and hold the sainein proper, square position with relationito the board. I

Another object is to provide a fastener of this class having alminimum number of coacting parts, connectedtogether for operation in a manner to prevent their accidental separation, and'toprevide simple means -for retaining the device in countersunlr position in the board, with the exposedsurfaces of the parts lying iiush with the surface thereof, except the paper engaging member, which maybe easily detached from .the paper yby the linger nail. v

A full andcomplete runderstanding of the invention may be obtainedrfrom a consideration of the following detailed description, taken in connection vwiththe accornpanying` drawing forming a part of` this specification, it4 being understood that while the drawing shows a practical formxof the invention, the latter is not to be' `conlined to strict conformity with the showing thereof, but may be changed or modified, so long as such changes or modifications mark no material departure from Vthe salient features of the invention, as specifically pointed out inthe appended claims. ln the drawing, in which similar reference characters designate corresponding parts throughout the several figures :M-

Figure lis a plan view of a portion of a drawing board having the improved paper fastener applied thereto and shown inthe act of holding a sheet of paper.

Figure 2 is a transverse sectional view `taken substantially on the line 2 2 of Figure l, and drawn on a larger scale.

Figure 3 is a longitudinal sectional view of the subject matter of Figure 2, the paper holding member being in depressed position.

Figure 4 is a view similar'to Fig. 3, the paper holding member being raised as for the reception or release of the paper.

Figure 5 is a vertical, transverse section taken on the line 5 5 of Figure 3. Y

Figure 6 is a view similar to Figure 5, of

a slightly modified form of the invention.

Figure 7 is a fragmentary plan view showing another modification of the invention properly mounted in the board.

Figure 8 is a longitudinal sectional view of the same, the paper holding member being shown in position for engaging and holding the paper.

Figure 9 is a view similar to Figure 8, the holding member being elevated to receive or release the paper.

llfhile the different forms of the paper fastener have been illustrated in the drawing as being applied to a board having the characteristics of the board shown and described in the above-mentioned parent case, it must be understood that the invention may be as easily applied to and used with equal advantage in connection with an ordinary drawing board, having smooth, uninterrupted working surface, such as are in common use.

As illustrated in Figures l to 5 inclusive, the invention comprises a metallic casing, preferably formed of thin sheet brass of a proper length and bent longitudinally to provide spacedr side walls l and 2 respectively, of elongated, rectangular form, as viewed from the side, and joined together by a bottom wall 3 formed integrally therewith and co-extensive with the length of the same.

The casing is adapted to be inserted in a proper", pre-formed slot or lrerf 4l formed in the board at the proper distance from the lefthand side edge thereof, it being understood, of course, that the fasteners are used in duplicate ordinarily, and that there isa slot or lr'erf for each fastener, though in the case of very large boards for making large plans or working drawings, etc., or for tracing the same` the fasteners may occur at more frequent intervals in longitudinal alineinent with each other and arranged ,vertically on the board.

One of the walls of the casing, say the wall a plain, f

' cent to one end thereof, preferablythe end 1, which is located adjacent to the lefthand side edge 'of the board, is provided adjaadjacent to the loweredge of the board, or that edge closest to the draftsman, with an inwardly directed pivotal point 5, which is preferably formed byv indenting the saidV wall Vfrom the outside thereof, or puncturing the same to provide one or more projections of the sheet metal, said projections extending towards the opposite wall of the casing to provide the aforesaid pivot.

Adjacent to .the opposite or upper ends of each side wall the metalis punched outwardly, during the process offorming the casing and prior to placing the same in the slot or lerf, as clearlyr shown in- Figurev 2 of I the drawing to form outwardly directed prongs 6, extending from either'side of the casing and adapted to engage the opposite walls of'theslot or lrerf 4 and tolpenetrate the wood of the board to hold the casing in position in said slot or kerf, in orderzto prevent accidental displacement of the same.

The casing may be introduced endwise intol the slot or vlierf or in an inclined position with the prongs 6 at a distance from their positions when fully -seatedand by moving kthe casing longitudinally within the kerf, the opposite end ofv the same may be forced down into position with` both ends properly seated. rlhe prongs will, when thus forced, form a transversely disposed or inclined entrance groove in the sides of the kerf and also longitudinal grooves therein, but the same -will soon become partially brass or some other metal having similary qualities, said lever being seine-what shorter than the casing rand of Asubstantially the y saine width as the walls 1 and At one K end the lever 7 is provided with an aperture 8, into which is vadapted to extend the aforesaid pivotal point` 5, thelever being held thereon by the engagement 'with the sides of the casing. y Y

With the lever thus mounted between the side walls l and 2, the bottom edge of said lever is close to and parallel'with the bot` tom wall of the casing and when the lever .is depressed, the upper edge of the same is flush with the upper edgesof the said walls. rlhe opposite end of the lever is provided with an integral, laterally extending arm 9 bent at right angles to the lever and adapted to ,extend out over ythe adjacentportion of the drawing board, the arm 9 having an integral, terminal prong or point lO depending Vtherefronifand adapted to be seated in arecess 11 formed in the board for the reception'of the saine vwhen the lever is fully depressed. The edge of the said arm 9 located at the terminal of the lever is turned Y slightly upward, as at 12, to form a finger hold to be engaged` by the finger nail for "raising the lever, as indicated in Figure 3 of the drawing. When the 'lever is thus raised, the edge of the paper 13, as shown in Figure 2, vmay be inserted thereunder, the point of the prong being then free of the .recess 11, and byuinserting the paper far enough to contact withl thebody portion of the lever, thesaid papervmay be easily trued or squared on the board, when the lever is forced downwardly between the side walls and the prong caused to penetrate thevpaper and to be seated in the recess.

In Figure 6 of the drawing there is shown a simplified form of the above described fasftener in which the casing is entirely'eliminated,` and the lever 14 providedrwith the arm 15, prong'l and fingervhold 17, similarto the first described form, is embedded directly ina slot orfkerf 18 formed in the kdrawing board, the same beingof a width to freely receive the leve-r which is provided wi'tha laterally directedfprong 19 formed by punching, wh-ich'may act as a` pivot in 'an obvious manner. In seating the lever 14 in the said kerf, the end having the prong thereon maybe. introduced endwise into one end of the kerf and in an upstanding position, and then forcing the yprong longitudinally along'the kerf to the proper point when thelever may be swung downwardly to lie entirelyvwithin the lerf, and the prong K .will effectually serve as a pivotal point at the saine time prevent theY lever from becomingdetached. AIn like manner the aforev said casing having. the. side walls 1 and 2 may be introduced into the slot or lrerf as before described.

A further modification of the invention is shown in Figures 7, 8 and 9 wherein the casing is'inithe kformof a hollow boxing adaptedto be seated into la rectangular seat 20'formed in'V the upperface of the board 21. This boxing comprises a bottom yplate 22,V an end plate/23 and a top plate 24, the

latter vhaving an integral, centrally disposed, depending tongue 25. The top plate 24 Vis provided with a central laperture 26 through which a screw 27 may be introthe bottom plate, vand to enter the board, for holding the casing in position within the seat 20. A swinging plate 29 equal in width to the top` plate of the casing is hingedly connected thereto by means of atransverse slot 30 formedvtherein, and adapted to're- ,duced to traverse a screw hole 28 formed in ceive the aforesaid depending tongue 25, the inner edge of the plate or that portion lying beneath the top plate of the casing, being bent at an obtuse angle to provide the inclined leg 3l which extends downwardly and inwardly and contacts with the upper face of the bottom plate of the casing. When the associated parts are in the position shown in Figures 7 and 8, with the swinging plate, which is, in substance, the equivalent of the aforesaid swinging lever 7, in hori- Zontal alinement with the top plate of the casing, the said leg is at an angle, and when the plate or lever 29 is raised, the hinged engagement of the two parts causes the top plate to flex or bend upwardly, as shown in Figure 9, thus causing a strong downward pressure on the leg 3l which has been brought to a vertical position and is thus held with the free end of the lever 29 elevated above the surface of the board. The free end of the lever is provided with a depending prong 32 and is also preferably rounded as shown, the sides of the rounded portion being undercut, as indicated in dotted lines in Fig. 7, to serve as finger holds 33 for engagement by the finger nail in order to elevate the lever and free the prong from a corresponding recess 34; formed in the surface of the board.

The board is preferably provided with a depression 35 extending from the top to the bottom edges thereof, the opposite wall of which is formed on a gradual incline 36 so as to avoid creasing the paper or linen, and also to allow the blade 37 of a T-square (as shown in dotted lines in Fig. 2) to freely pass over the fasteners, as the same is shifted up and down on the board during the process of drawing.

From the foregoing it will be seen that a simple and cheaply manufactured paper fastener has been provided, which may be readily installed in drawing boards for the purpose of holding paper or linen for drawings or tracings, the same being easily operated to engage and hold the material, or to release the same, there being no delicate 1. A paper fastener for drawing boards,

comprising a metallic casing adapted to be countersunk in the board with its upper face Hush therewith, a lever fulcrumed at one end in the casing and adapted to be swung up or down, said lever having a pin to puncture and hold the drawing paper.

2. A device for fastening paper or the like on drawing boards, comprising a casing having its upper face substantially flush with the surface of the board, a lever hinged at one end to the said casing and adapted to be swung toward or away from the board, means for holding the casing in the board, a finger hold formed on the lever, and a pin carried by the lever to puncture and hold the paper or the like.

3. In a drawing board, a paper fastening means, comprising a casing embedded in the board and open at the top, a verticallyswingable lever fulcrumed at one end in the casing and having an arm at the other end, said arm having a finger-hold, and a downturned terminal pin entering a recess in the board and adapted to puncture the paper to hold the same in position.

'4. A paper fastener for drawing boards, comprising a U-shaped casing embedded in the board with the open side of the casing flush with the surface of the board, outward projections carried by the walls of the casing and entering the board to prevent the dislodgment of the casing, an inwardly directed projection carried by one of the walls near one end of the casing, a vertically swinging lever having an opening at one end to receive said projection to fulcrum said lever between the walls of the casing, said lever having an overhanging arm terminating in a depending pin for puncturing the edge of the drawing paper when the lever is pressed down into said casing.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature.

JOSIAH WILSON MCADAM. 

